Yasiin Bey (formerly Mos Def) has always been known as one of hip hop’s most conscience rappers, always willing to use his rhythmic prose to challenge the status quote. Though his latest attempt at bringing public attention to the force feeding procedure carried out at Guantanamo Bay not only shakes you mentally; the sight of his attention-grabbing act is enough to turn your stomach.

The video is quite uncomfortable to watch–especially the part when tubes are forced down the entertainer’s nose and towards his stomach. Bey, 39 eventually begs to end the experiment after wailing up in tears and pain.

Of the 166 prisoners held at the U.S. Navy base in Guantanamo, more than half of them have been participating in a hunger strike that has been going on for months, according to the Washington Post. While lawyers for the prisoners claim the procedure amounts to torture, the U.S. Justice Department says it keeps them from starving to death.